diff options
Diffstat (limited to 'test/Transforms/LoopUnroll/full-unroll-heuristics-phi-prop.ll')
| -rw-r--r-- | test/Transforms/LoopUnroll/full-unroll-heuristics-phi-prop.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/test/Transforms/LoopUnroll/full-unroll-heuristics-phi-prop.ll b/test/Transforms/LoopUnroll/full-unroll-heuristics-phi-prop.ll new file mode 100644 index 000000000000..dd8582e6877f --- /dev/null +++ b/test/Transforms/LoopUnroll/full-unroll-heuristics-phi-prop.ll @@ -0,0 +1,23 @@ +; RUN: opt < %s -S -loop-unroll -unroll-max-iteration-count-to-analyze=100 -unroll-dynamic-cost-savings-discount=1000 -unroll-threshold=10 -unroll-percent-dynamic-cost-saved-threshold=50 | FileCheck %s +target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" + +define i64 @propagate_loop_phis() { +; CHECK-LABEL: @propagate_loop_phis( +; CHECK-NOT: br i1 +; CHECK: ret i64 3 +entry: + br label %loop + +loop: + %iv = phi i64 [ 0, %entry ], [ %inc, %loop ] + %x0 = phi i64 [ 0, %entry ], [ %x2, %loop ] + %x1 = or i64 %x0, 1 + %x2 = or i64 %x1, 2 + %inc = add nuw nsw i64 %iv, 1 + %cond = icmp sge i64 %inc, 10 + br i1 %cond, label %loop.end, label %loop + +loop.end: + %x.lcssa = phi i64 [ %x2, %loop ] + ret i64 %x.lcssa +} |